D21H 23/18
Addition at a location where shear forces are avoided before sheet-forming
Official title: Addition at a location where shear forces are avoided before sheet-forming, e.g. after pulp beating or refining
D21H23/18 (Addition at a location where shear forces are avoided before sheet-forming) appears on 35 US grants and 10 published applications in this corpus.
Search patents in D21H- Granted patents
- 35
- Published applications
- 10
- Assignees
- 23
- Inventors
- 67
- Latest grant
- 5 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 2 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for manufacturing paper and cardboard5 Nov 2024US 12,134,860 B2Snf Group
- Composition comprising cross-linked anionic, organic polymeric microparticles, its preparation and use in paper and paperboard making processes19 Apr 2022US 11,306,441 B2Solenis Technologies, L.P.
- Method for manufacture of paper, board or the like and use of the composition29 Sep 2020US 10,787,768 B2Kemira Oyj
- Process for the manufacture of paper and paperboard30 Oct 2018US 10,113,270 B2BASF SE
- Process for the manufacture of paper and paperboard25 Apr 2017US 9,631,319 B2BASF SE
- Method for manufacturing paper and cardboard8 Aug 2024US 2024/0263398 A1Snf Group
- Composition comprising cross-linked anionic, organic polymeric microparticles, its preparation and use in paper and paperboard making processes9 Jul 2020US 2020/0217015 A1Solenis Technologies Cayman, L.P.
- Method for manufacture of paper, board or the like and use of the composition18 Jul 2019US 2019/0218717 A1Kemira Oyj
- Process for the manufacture of paper and paperboard3 Dec 2015US 2015/0345081 A1BASF SE
- Process for the manufacture of paper and paperboard29 Jan 2015US 2015/0027650 A1BASF SE
Most cited
By later US patents
- Crosslinked cellulose products and method for their preparation114US 5,225,047 AWeyerhaeuser Company · 1993
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- Sized paper, process for producing same and use thereof76US 5,374,335 AEka Nobel AB · 1994
- Wet-formed absorbent composite59US 5,651,862 AKimberly-Clark Worldwide, Inc. · 1997